• 250 Watts into 8 Ohms
• 300 Watts into 4 Ohms
• 2U rack mountable
• Perfect for home theatre surround sound speakers
• Can also be used in distributed audio

The MI254 4-Channel Digital Amplifier is a versatile multi-channel amplifier ideal for use in distributed audio, home theatre or 2-channel stereo playback. It delivers 250 Watts into 8 Ohm speakers or 300 Watts into 4 Ohm speakers via its highly sophisticated closed loop digital switching amplifiers. These amplifiers are paired with extremely robust power supplies that produce performance levels rarely achieved in distributed audio.

It has installer-friendly physical dimensions and is 2U rack mountable via the included mounting ears (the mounting ears are removable for non-rack installations). As a highly efficient Class D amplifier, it does not require noisy cooling fans to maintain nominal operating temperature. In addition to distributed audio use, the MI254 is well suited for home theatres to drive surround sound speakers and could be integrated into virtually any existing home theatre system.

On the front panel are two blue McIntosh Watt Meters that display the summed power output of channels 1 + 2 and channels 3 + 4. Multi-colour LED indicators display the status of each channel. The back panel includes both a balanced and unbalanced input for each channel along with our standard 5-way speaker binding posts.

Other features that come with the MI254 are: Loudspeaker Guard signal overload technology that prevents overdriving the speakers; our Sentry Monitor™ short-circuit protection circuit that disengages the output stage before current exceeds safe operating levels and then resets automatically when operating conditions return to normal; BUS input & outputs to easily distribute a stereo signal to multiple outputs and/or multiple amplifiers; individual channel inputs; 12 Volt triggering capabilities; and eco-friendly on/off signal sensing that turns the unit off if no input signal has been detected for a set amount of time or automatically turns the amp on when it senses a signal. 

The MI254 includes many McIntosh design cues including a black glass front panel, blue Watt meters, an illuminated McIntosh logo, and a familiar form factor highlighted by silver trim. Contact your local dealer to learn more about integrating the MI254 into your custom audio installation.

Specifications

• ELECTRONIC SPECIFICATIONS

  • Power Output per Channel

    250 Watts into 8 Ohms
    300 Watts into 4 Ohms

  • Number of Channels

    4

  • Total Harmonic Distortion

    0.025%

  • S/N below rated output

    100dB

  • Dynamic Headroom

    8 Ohms: 2.5dB
    4 Ohms: 3.5dB

  • Damping Factor

    8 Ohms: >85
    4 Ohms: >45

  • Rated Power Band

    20Hz to 20kHz

  • Frequency Response

    +0, -0.9dB from 20Hz to 20,000Hz

  CONTROL

  • Remote Power Control

    Yes

  • Multi-Channel DB25 Cable

    N/A

  CONNECTIVITY

  • Speaker Binding Post Type

    Standard

  GENERAL SPECIFICATIONS

  • Circuit Configuration

    Closed loop digital switching

  • Circuit Design

    Digital

  • Mono Bridge

    N/A

  • Mono Parallel

    N/A

  • Output Type

    Direct Coupled

  • Meters

    Yes

  • Meter Light Switch

    No

  • Balanced Input

    4

  • Front Panel

    Glass with removable rack mounting ears

  • Illumination

    Direct LED

  • Chassis Style

    Black painted steel

  WEIGHTS & DIMENSIONS

  • Dimensions (W x H x D)

    17-1/2" (44.45cm) (19" (48.3cm with mounting ears)) x 4-5/16" (11cm) (including feet) x 21" (53.3cm) (including front panel and cables)

  • Weight

    23.5 lbs (10.7 kg)

  • Shipping Weight

    40 lbs (18.1 kg)